Fact:
Obama voted for hundreds of miles of additional fencing along our Southern border, more vehicle barriers, checkpoints, and lighting to help prevent people from entering our country illegally.
So did Hillary Clinton, Chuck Schumer, Joe Biden, and Dianne Feinstein. Why are they suddenly against a wall?
Because it's a Republicans idea. All that matters is that they go against what the opposition says.
Same with global warming. Since Al Gore is the spokesman, the Republicans will go against Global Warming. Because of that, the Democrats push that it's real. Neither side has real answers, you need data of cooling and heating of the earth from 100,000s of years if not millions to accurately say humans are actually making a difference to the natural state, but as long as one side says one thing the other will say the opposite.
Look at gun control and planned parenthood, same thing. Although planned parenthood was called something else before which was to stop black people breeding to save on welfare but the name was too obvious so it was changed. But the republicans should support that however since the Democrats do, they are against it.